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The magnetic properties of dilute PrGd and PrEu alloys were investigated by bulk magnetization measurements in fields up to 6 T and by exp 151 Eu and exp 155 Gd Moessbauer spectroscopy. Both exp 151 Eu and exp 155 Gd Moessbauer spectra exhibit magnetic hyperfine spliting below about 10 K even in the most dilute alloys investigated (approx. <= 1 at%). For concentrations <= 2% Eu, this magnetic splitting is due to slow relaxation of the electronic moment of Eu. From the observed quadrupole splitting of the exp 155 Gd Moessbauer spectra, an estimate for the crystal field parameter B exp 02 in Pr is derived. The magnetic polarization of the Pr ions in a cluster around a Gd moment was calculated impurity is surrounded by an antiparallel polarization cloud; both combine to a small net moment (dwarf moment). These dwarf moments are shown to explain qualitatively the observed difference between the magnetization of the alloys and that of pure Pr at low temperatures. (ERA citation 08:007909)